Method of simultaneously strengthening the surface of a borehole

Details Method of simultaneously strengthening the surface of a borehole Method of simultaneously strengthening the surface of a borehole

1975-10-28

1977-03-29

Shapiro, Jacob

Wells

Receptacles

With separate air chamber having openable passage

61 5358, 61 536, 166292, E02D 542, E02D 562

Patent

active

040141748

ABSTRACT:
An improved method of consolidating the surface of a borehole in an incompetent formation and simultaneously strengthening the bond between the surface of the borehole and cement placed in the borehole is achieved by forcing an aqueous solution of a multivalent cation salt into the formation, thereafter forcing an alkali metal silicate solution which has a pH less than 12.0 containing at least 12% by weight silica into the formation, and thereafter forcing an aqueous cement slurry containing at least 2% by weight of a water soluble multivalent cation salt to contact the surface of the borehole. A cementitious piling intimately bonded to the formation is prepared by filing the stabilized borehole with an aqueous cement slurry and allowing the cement to harden.

REFERENCES:
patent: 3884302 (1975-05-01), Messenger

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